System 7 are a British ambient dance band. Due to the existence of another band called System Seven they were initially billed as 777 in North America. System 7 was the name of the current Macintosh Operating System at the time of the band's formation.Steve Hillage and Miquette Giraudy, both formerly of Gong, formed System 7 after hearing the likes of the Orb playing Hillage's 1979 ambient record Rainbow Dome Musick. They soon became part of the underground dance scene in London.